private void OperationButton_Click(object sender, RoutedEventArgs e)
{
var clickedButtonContent = ((Button)sender).Content.ToString();
switch (clickedButtonContent)
{
case "AC":
ResetCalculator();
break;
case "%":
if (double.TryParse(ResultTextBlock.Text, out _lastNumber))
{
_lastNumber = _lastNumber / 100;
ResultTextBlock.Text = _lastNumber.ToString();
}
break;
case "+/-":
if (double.TryParse(ResultTextBlock.Text, out _lastNumber))
{
_lastNumber = _lastNumber * -1;
ResultTextBlock.Text = _lastNumber.ToString();
}
break;
case ".":
PlaceDecimalPoint();
break;
case "+":
UpdateLastNumber();
_activeOperand = ActiveOperand.Add;
break;
case "-":
UpdateLastNumber();
_activeOperand = ActiveOperand.Subtract;
break;
case "/":
UpdateLastNumber();
_activeOperand = ActiveOperand.Divide;
break;
case "*":
UpdateLastNumber();
_activeOperand = ActiveOperand.Multiply;
break;
case "=":
PerformCalculation();
ResultTextBlock.Text = _result.ToString();
_lastNumber = _result;
break;
}
}
private void ResetCalculator()
{
_activeOperand = ActiveOperand.None;
ResultTextBlock.Text = "0";
}
private void Window_KeyDown(object sender, KeyEventArgs e)
{
var keyPressed = e.Key;
switch (keyPressed)
{
case Key.D0:
UpdateResultTextBlock(0);
break;
case Key.D1:
UpdateResultTextBlock(1);
break;
case Key.D2:
UpdateResultTextBlock(2);
break;
case Key.D3:
UpdateResultTextBlock(3);
break;
case Key.D4:
UpdateResultTextBlock(4);
break;
case Key.D5:
UpdateResultTextBlock(5);
break;
case Key.D6:
UpdateResultTextBlock(6);
break;
case Key.D7:
UpdateResultTextBlock(7);
break;
case Key.D8:
UpdateResultTextBlock(8);
break;
case Key.D9:
UpdateResultTextBlock(9);
break;
case Key.OemPeriod:
PlaceDecimalPoint();
break;
case Key.OemPlus:
UpdateLastNumber();
_activeOperand = ActiveOperand.Add;
break;
case Key.OemMinus:
UpdateLastNumber();
_activeOperand = ActiveOperand.Subtract;
break;
case Key.Multiply:
UpdateLastNumber();
_activeOperand = ActiveOperand.Multiply;
break;
case Key.Divide:
UpdateLastNumber();
_activeOperand = ActiveOperand.Divide;
break;
case Key.Back:
ResultTextBlock.Text = ResultTextBlock.Text.Substring(0, ResultTextBlock.Text.Length - 1);
break;
case Key.Delete:
ResetCalculator();
break;
case Key.Escape:
Close();
break;
case Key.Enter:
PerformCalculation();
ResultTextBlock.Text = _result.ToString();
_lastNumber = _result;
break;
default:
break;
}
}